Profile matched to the rotor
Mounting faces and length verified against drawing or sample so the bar seats correctly and runs balanced.
Crusher Wear Parts
Hazemag Blow Bars
Replacement bars for Hazemag impactors, cast in the alloy that matches your feed rather than a single default grade.
Overview
About hazemag blow bars
Hazemag impactors are widely used on limestone and aggregate duty, and the blow bar profile has to seat exactly for the rotor to run true. Melco produces replacement bars for the common APK, APS and APSE families, working from drawings, a sample bar or a scan of a worn part.
We cast the same profile in high chrome, martensitic steel and austenitic manganese steel. Which one you should run depends on the feed: high chrome for clean abrasive rock, manganese where tramp metal appears, martensitic where the duty sits between the two.
Mounting faces and overall length are checked against the drawing before dispatch, because a bar that is correct in hardness but wrong on the seat will hammer the rotor rather than the rock.
Applications
- Hazemag APK, APS and APSE impact crushers
- Limestone crushing for cement production
- Aggregate and road base production
- Primary and secondary impact crushing circuits
Features
What you get
Three alloy families available
The same bar in high chrome, martensitic or manganese steel, so the alloy follows the feed.
Supplied in matched sets
Bars are poured and weighed as a set to keep the rotor in balance across a change-out.
Reverse engineering from worn parts
No drawing needed. We recover the original geometry from the unworn mounting surfaces.
Specifications
Manufacturing specification
Applies to hazemag blow bars produced at our works. Castings outside this range can usually be accommodated, so please ask.
| Moulding | No-bake resin sand and green sand |
|---|---|
| Melting | Induction furnace, spectrometer-controlled |
| Piece weight | 5 kg – 2,000 kg |
| Heat treatment | In-house, computer-controlled cycles |
| Dimensional control | Template and CMM check against drawing |
| Documentation | Chemical, hardness and dimensional report per heat |
Material grades
| Grade | Typical composition | Hardness | Suited to |
|---|---|---|---|
| ASTM A532 Cl. II Type B (15Cr-3Mo) | 14–18% Cr, 2.5–3.5% Mo, 2.4–3.0% C | 58–64 HRC | General high-abrasion impact crushing |
| ASTM A532 Cl. II Type D (20Cr-Mo) | 18–23% Cr, 1.5% Mo max, 2.0–3.3% C | 58–63 HRC | Abrasive limestone and secondary duty |
| Low-alloy martensitic steel | 0.3–0.5% C, Cr-Ni-Mo alloyed | 45–52 HRC | Mixed impact and abrasion |
| Martensitic / manganese composite | Hard martensitic face, austenitic Mn body | 50 HRC face, tough core | Reinforced concrete and recycling |
| ASTM A128 Grade A | 1.05–1.35% C, 11.0–14.0% Mn | 200–229 BHN as-cast, 500+ BHN work-hardened | Standard high-impact duty |
Composition ranges are quoted against the published standard. Actual analysis for your heat is issued with the castings.
Gallery
From our works
-
Replacement bar produced from a customer sample. -
High chrome bars after fettling, before dimensional check. -
Mounting profile: the face that decides whether a bar seats square.
Questions
Hazemag Blow Bars: common questions
Which Hazemag crushers do your blow bars fit?
We regularly supply bars for the APK, APS and APSE impactor families. If you can send the machine model and either a drawing or a worn bar, we will confirm the fit before quoting.
Do I have to replace all blow bars at once?
Yes, as a set. Mixing new and part-worn bars puts the rotor out of balance, which accelerates bearing wear and can crack the rotor body. We supply weight-matched sets for this reason.
Can you supply bars without an OEM drawing?
Yes. A worn bar is usually enough. The mounting faces do not wear, so we can recover the original section and rebuild the wear profile from them.
Are these genuine Hazemag parts?
No. Melco Castings is an independent foundry and these are replacement wear parts made to fit Hazemag machines. We are not affiliated with or endorsed by Hazemag, and we use the machine name only to identify the fitment.
More from our range
Related products
Enquiry
Enquire about hazemag blow bars
Tell us the machine, the feed and the quantity. If you have a drawing or photographs of the worn part, mention it and we will send an upload link.
Melco Castings is an independent manufacturer of replacement wear parts. Machine and OEM names are used only to identify the equipment our castings fit. We are not affiliated with, endorsed by, or a distributor for any of these manufacturers.